Finding the Fourth Proportional to 431,139.36, 643,337.20 and 386,309.44
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Solution
The fourth proportional to 431,139.36, 643,337.20 and 386,309.44 is: 576,442.92
Step by Step Solution
- Step 1: Write the proportion equation
431,139.36 : 643,337.20 = 386,309.44 : x - Step 2: Convert to fraction form
431,139.36/643,337.20 = 386,309.44/x - Step 3: Cross multiply
431,139.36x = 643,337.20 × 386,309.44 - Step 4: Simplify right side
431,139.36x = 248,527,233,463.17 - Step 5: Solve for x
x = 248,527,233,463.17/431,139.36 - Step 6: Final answer
x = 576,442.92
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.